Cutter blade holder



June 4, 1935. B. TEwr-:Low AL CUTTER BLADE HOLDER Filed July 26, 19552 Bnbentors.

67 Cama w/ Patented June 4, 1935 UNITED STATES l 2,003,497 VCurran BLADE HOLDER Bernard Tewelow, Wilmington, Del., and Solomon YTewelow, Philadelphia, Pa.

Application July 26, 1932, serial No. 624,728

1 claim.

n Our invention relates to improvements in cutter-blade holders, and is especially directed to an improved holder for receiving and holding razor blades so the latter may be useful as knives or cutters after they have served their purpose as a A.razor blade.

One object of our invention is to provide an improved holder of such construction that the blade may be attached thereto so as to form a knife or to form a scraper, and

Another object is to provide an improved blade holder having a detachable handle and so constructed that when the handle is being attached to form a knife the parts will be automatically adjusted to their proper relative positions. to

clamp the blade between them with one cutting edge of `the blade entirely concealed to provide protection against accidental injury to the operator.

The invention is illustrated in the accompanying drawing, wherein,-

Fig. 1 shows the improved holder in perspective with a blade attached thereto so as to form a knife, the same being associated with a strip of fabric which is being cut.

Fig. 2 illustrates, on an enlarged scale, a longitudinal section through the blade and clampmembers and also through the engaging end of the handle.

Fig. 3 is a view of the device taken on the line 3 3 of Fig. 2, with the greater portion of one of the two clamping members broken away to show the blade in clamped position.

Figl 4 illustrates the holder in perspective but with the clamping members and blade attached to the handle so as to form a scraper, and

Fig. 5 shows an enlarged sectional detail through the same as viewed on the line 5 5 of Fig. 4.

In the drawing, the numeral 8 designates the handle which has a short externally screwthreaded stem 9 projecting from one end thereof and which, at the opposite end, is provided with a central internally screw-threaded socket I0. At the outer end this socket is gradually enlarged, which enlargement has a tapered annular clamping wall I I, for a purpose that will presently be explained.

Our improved holder employs, in addition to the separate handle, two blade-clamping and guard plates I2 and I3 respectively. We use the expression, clamp and guard in dening these two plates, because they actually cover the blade they clamp, so that only one cutting edge of that blade is exposed, as will hereinafter more clearly appear.v o

The combined clamp and guard plate I2 has an inner hat clamping face I4 and at one end has a circular externally-threaded stem I5. Y

This plate |2 also has two inclined lugs I5 punched therefrom so as to project at `the inner flat-face side thereof, and it will be noted, that said lugs both incline'in the same direction.

Midway between the lugs l5, the plate I2 also has a circular opening therethrough from the outerto the inner side thereof.

Particular attention is called to the fact that the lugs i6 and the circular opening I'I of vplate Y I 2 are all located in a longitudinal line nearer the bottom edge I8 of the plate than to the top edge I9 thereof. This is important for reasons that will presently be explained.

The guard and clamp plate I3 also has a flat inner face, and at the handle-engaging end is provided with a projecting end-lug 20 which has converging inclined upper and lower edges 2|. The inclination of these edges 2|, is such that the narrower end of the lug will enter the socket |D of the handle while the upper and lower inclined edges 2| thereof will engage the tapered wall II of said handle-socket.

While the plate I2 also has a tapered edge construction, as can be seen in Figs. 1 and 4, those edges do not have the function of wedging in the handle-socket, as they are slightly closer from top to bottom, thus permitting the .edges 2| of lug 20 to certainly engage the socket-wall before the tapered edges on the plate I2 will engage that wall.

'Ihe purpose of certainly engaging the edges 2| of lug 20 of plate I3 before the tapered edges on plate I2 make such engagement in the socket, is, so that the plate I3 will be moved forward slightly with respect to plate I2, to eiect a locking-together of the plates, as will presently be explained.

The plate .I3 has two spaced-apart slots 22, each of which has a wall 23 that inclines in a direction that corresponds to the inclination of the lugs |6 that project from the plate I2 so that by a slight forward sliding of the plate I3 over plate I2, the inclined walls 23 of plate I3 are seated under the inclined lugs I6 of plate I2 and the two plates are thereby drawn toward each other.

This slight lengthwise movement of plate I3 is caused by the inclined edges 2| of lug 2U on plate |3 engaging the tapered wall of the handle-socket.

The plate I3 further has a circular opening 24 between the two slots 22 and the interior of this opening 24 is provided with screw-threads.

When the two plates I2 and I3 are engaged by the handle and locked together, the openings I'I and 24 are aligned.

The razor-blade 25 is of the double-edge type' in that its two longitudinal edges 26 are cuttingedges. This blade has a central perforation 21 and two slightly elongated perforations 2B fore and aft of the central perforation.

All of these perforations 2'I and 28 in the blade are longitudinally centered between the two cutting edges 26, whereas the lugs I6 and opening I'I in plate I2 and the slots 22 and opening 24 of plate I3 are all located longitudinally in a line nearer the bottom than the top edges of said plates I2 and I3. Y Y

The object in thus locating the lugs and slots in the plates I2 and I3 is, that when the blade 25 is clamped between the inner hat faces of said plates with the lugs IB of plate I2 passing through the perforation28 of the blade, the latter will be held between the plates with the lower cutting edge 26, only, exposed, While the upper cutting edge will be entirely covered by said plates,

which will form a guard to prevent injury to a persons iingers while handling the device.

It will be noted that when the handleis attached to the end of the plates, as in Figs. 1, 2 and 3, no clamping means or other device projects infront of the forward corner 29 ofthe blade so that the holder and blade may be inclined to a marked degree to enable a line marked on a piece of fabric to be readily traced, as when cutting out patterns.k

It will also be noted that when it is desired to use the holder as a scraper, the handle may be reversed, end-for-end, and the threaded stem' 8 thereof passed freely through opening I'I of plate I2, then through the central opening 21 of the blade and finally screwed into the threaded opening 24 of plate I3, and thus securely clamp the blade between the two plates, as shown in Figs. 4 and 5.

Having described our invention, We claim,-

A holder for razor blades having in combination a handle provided at one end with a longitudinally-extending internally-threaded socket with a tapered annular clamping wall and at the opposite end having a projecting threaded stem, two disconnected and separable clampingplates,-one having two spaced-apart inclined lugs punched therefrom so as to project at the inner side thereof and also having an intermediate opening While the other of said disconnected plates is provided with spaced slots each with an inclined Wall to receive said punchedout inclined lugs and an intermediate screwthreaded opening, one of said disconnected plates also having a threaded stem at one end to enter the longitudinally-extending internally-threaded handle-socket and the other of said two plates having an end lug with inclined edges to engage the annular clamping Wall of the handle-socket whereby the two plates with a blade between them may be drawn toward each other to clamp the blade when the plate having the lug with the inclined edges engages the clamping wall of the handle-socket, or, said plates with a blade between them may be attached to the handle by passing the stem of the handle through the intermediate opening of the lug-plate then through the blade and screwing said stem into the intermediate threaded opening of said other plate.

BERNARD TEWELOW. SOLOMON TEWELOW. 

